Brush-holder for dynamo-electric machines.



Patented Nov. 19, l90l.

G. HEIDEL. BRUSH HOLDER FOR DYNAMOELEGTRIG MACHINES.

(Applicatjoufiled Mar. 1a, 1901.

in Model.)

UNITED STATES PATENT OFFICE.

GUSTAVOS HEIDEL, OF ST. LOUIS, MISSOURI.

BRUSH-HOLDER FOR DYNAMO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 686,729, dated November 19, 1901.

Application filed March 1 8, 1 9 01.

T ctZZ whom it may concern:

Be it known that I, GUSTAVOS HEIDEL, a citizen of the United States, residing in the city of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Brush-Holders for Dynamo-Electric Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to a brush-holder for use on dynamo-electric machines, such as dynamos or motors; and the invention has for its object to produce a holder of the character stated of such nature that the parts may be readily and accurately adjusted to place the brushes in proper positions relative to the commutator against which they bear and also to provide means whereby brushes of varying thicknesses may be utilized and means whereby the brushes are fed yieldingly and gradually to the commutator.

My invention consists in features of novelty hereinafter fully described, and pointed outin the claims.

Figure I is a perspective view of my brushholder. Fig. II is an enlarged detail view of one of the brush-sockets. Fig. III is a sectional view taken on line III III, Fig. II. Fig. IV is a sectional view taken through one of the side flanges of the brush-sockets. Fig. V is an enlarged detail View of the inner end of the yoke-handle, a portion of the yoke being shown in cross-section. Fig. VI is a detail perspective view of one of the brush-holding clips.

1 designates the yoke of the brush-holder, provided with arms 2. This yoke is adapted for application to the bearing of the armature shaft of the machine to which the holder is applied, and it is adjustably held to said bearing by the screw-threaded setting-stem 3, carried by a handle 4, of insulating material, such as vulcanized fiber.

Mounted in the arms 2 of the yoke l are rods 5, adjustably held to the arms by nuts 6, so that the said rods may be rotated when the nuts are loosened to permit desired positioning of the rods for the purpose of adjusting the brushes with relation to the commutator against which they hear. The rods 5 are seated in insulating-bushings 5 in the arms 2 and Serial No. 51,605. (No model.)

contain apertures 7, that receive the terminal wires from the fields of the machines, the said wires being secured in said apertures by binding-screws 8.

designates brush-receiving sockets adjustably mounted on the rods 5 by means of set-screws 9, having knobs of insulating material, such as vulcanized fiber, the said sockets being readily moved to the desired angles relative to the commutator upon the loosening of the set-screws 9. The sockets 10 are recessed to receive the brushes A, that may be of carbon or other suitable material of whichsaidbrushesarecommonlymade. The brushes A, seated in the recesses of the sockets 10, are guided therein between strips 11, that are adjusted to the edges of the brushes by adjustment-screws 12, mounted in the sockets and arranged to bear against the strips, so that said strips may beso set with relation to the brushes as to effect their alinement and direct them properly to the commutator.

13 designates spring-clips adapted to bear against the outer sides of the brushes A to maintain them in the sockets 10, the said clips being adjustably fixed to the sockets to permit of their movement thereon for the purpose of accommodating the holder to the reception of brushes of varying thicknesses. The means whereby the clips are adjustably connected to the sockets consist of set-screws 14, that pass through slots 15 in the clips and are seated in the edges of the sockets, and for convenience in positioning of the clips I provide slots 16 therein, that receive guide-studs 17, carried by the sockets.

I will now describe the means whereby the brushes are yieldingly fed to the commutator.

In the sockets 10 are pockets 18, that contain springs 19, which surround slide-rods 20, having heads 21 arranged to operate in said pockets and to receive the pressure of said springs, as seen in Fig. III. The slide-rods extend loosely through the sockets 10 from the pockets 18 and are equipped with arms 22.

23 represents adjustment-screws mounted in the arms 22 and equipped with jam-nuts 24, adapted to bear against the arms 22 when said adjustment-screws are set into the de' sired positions. The innerends of the adj ustment-screws 23 bear against the rear edges of the brushes A and hold said brushes forwardly under the action of the springs 19, which tend to move the arms 22 forwardly in consequence of the exertion of said springs against the heads 21 of the slide-rods 20. It Will be observed that the adj ustment-screws 23 may be set to a nicety with relation to the brushes A, and according to the compression of the springs 19 the brushes may thereby be fed to the commutator with any desired degree of pressure thereagainst.

The slide-rods 20 are rockingly mounted in the sockets 10, so that the arms 22, carried thereby, may be swung sidewise to carry the adjustment-screws 23 out of line with the brush-receiving recess of the socket, as seen in Fig. II, so that the brushes may be readily inserted or removed from the sockets.

I claim as my invention 1. In a brush-holder, the combination of a socket adapted to receive the brush, springcontrolled slide-rods rockingly mounted in said socket, arms carried by said rods, and adjustmentscrews mounted in said arms adapted to bear against said brush, substantially as described.

2. In a brush-holder, the combination of a socketadapted to receive the brush, guidestrips seated in said socket and adapted to bear against the edges of the brush, and adjustment-screws seated in said socket and arranged to bear against said guide-strips, substantially as described.

3. In a brush-holder, the combination of a socket adapted to receive the brush, and adjnstable spring retaining-clips carried by said socket and adapted to bear against said brush, substantially as described.

GUS'IAVOS HEIDEL.

In presence of- E. S. KNIGHT, N. V. ALEXANDER. 

